It's the first Wednesday of the month, so time for an Insecure Writer's Support Group post.
Insecurity is often seen as a negative thing - uncertainty, lack of confidence, unsafe. It can mean that and I'm sure all writers have felt a little bit that way at least occasionally.
Insecurity can also mean not fixed or firm. That could be a good thing. Our first ideas for a story aren't fixed and firm - we can develop the plot and characters how we wish, take the storyline wherever we like.
Another definition of insecure is 'likely to give way'. That's not safe and cosy, but maybe it's something we should try on the page?